/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertPackageEvents.h
struct FConcertFinishSendPackageParams : public [UE::ConcertSyncCore::ConcertPackageEvents::FConcertBaseSendPackageParams](API\Plugins\ConcertSyncCore\FConcertBaseSendPackageParams)
FGuid
MessageId
The ID of the message that causes the package to be acknowledged.